Jagged 3d lines [Archive]

bowtle

2008-03-11, 05:08 AM

AutoCAD Civil 3D 2008 SP2

I have some survey drawings that have curb lines (face of curb, invert of curb and lip of gutter) as 3D splines. When I use the 3Dorbit command they appear jagged as tho the resolution is very low, but when I exit the command they appear perfectly smooth. (still in a 3D view)

I have noticed this in a drawing I am presently doing and can not work out why, so I opened a drawing I did previously and know that they appeared smooth while orbitting, but it appears jagged also.

I need to have the curbs smoothed so I can visually check the grading.

I have done a reinstall and upgraded to SP2 since I did the first drawing that the curbs appeared fine in, so I am guessing that it is some setting that is not stored in the drawing.

There are no solids or surfaces or meshes.

I know extremely little about 3D ... so any suggestions would be greatly appreciated.

Thanks in advance

Greg B

jaberwok

2008-03-11, 01:47 PM

Setting WHIPARC to 1 may help.

bowtle

2008-03-11, 09:49 PM

Thanks, but it did not solve the problem

Here is a part of a drawing i did previously that the splines appeared smooth in while in the orbit command.

also a couple of jpg's showing how it appears to me while in the orbit command (jagged) and when I exit the command (smoothed)

Thanks

arshiel88

2008-03-12, 12:18 AM

Try to move the objects as close as possible to the origin (0,0,0).

bowtle

2008-03-12, 12:39 AM

Well I must admit I was skeptical about this solution, but is sure works.

Thank you very much.

Now for the million dollar question WHY does it work???? ... maybe one for the Autodesk boffins.

I know it was fine before my reinstall .. I think I was only using SP1 at the time ... possibly a problem with SP2

Once again thanks ...

arshiel88

2008-03-13, 02:13 AM

Your welcome. I'm glad it helped. I'm sure there is an explanation but I'm not the one who can give you that. :D

bmonk.230609

2010-03-29, 03:18 PM

bmonk.230609

2010-04-13, 01:20 PM

I still havent found a solution.

Anyone else???

Thanks

arshiel88

2011-01-10, 01:36 PM

I think it is related in 32-bit limitations. If you can't move it close to origin, try upgrading to 64-bit machine.

Wanderer

2011-01-25, 07:43 PM

Hate to bring up an old post, but I'm having the same problem. However, I'm drawing my 3d objects on a geo referenced site that can't be moved closer to 0,0,0.

Any other solutions out there. I'm using Autodesk Map 3D 2009.

ThanksI'd heard before that it might be the 32-bit system being too limited to deal with it, but, I saw this post (http://forums.autodesk.com/t5/AutoCAD-2007/3D-To-far-away-from-WCS-origin/m-p/2207881) on the autodesk forums, that suggested "Apparently turning hardware acceleration off in 3DCONFIG did the trick."